Wells – Processes – Producing the well
Reexamination Certificate
2006-10-17
2006-10-17
Thompson, Kenneth (Department: 3672)
Wells
Processes
Producing the well
C166S068000, C166S264000, C417S058000
Reexamination Certificate
active
07121347
ABSTRACT:
A method and an apparatus raise samples of liquid such as water from a low level to a higher level, for example for obtaining a sample of groundwater from a borehole. The apparatus comprises a pair of tubes (14and16) extending alongside each other, which are introduced into the borehole, linked by a connector (20) at their lower end, a valve (22) communicating between the inside and outside of one of the tubes (16) near its lower end, and a pig (46) insertable into the tube (16). By adjusting the pressure in each tube at their upper end, the pig (46) can be moved from one end to the other of the apparatus (10) and used to transfer samples of water.
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Griffiths Peter Geoffrey
Murray Paul Anthony
Nevins Patrick Wakefield
Smith Stephen Wayne
AEA Technology Engineering Services, Inc.
Holt William H.
Thompson Kenneth
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